Adderall XR and dizzy spells

I have had really bad anxiety and panic disorder for a year now from being a former pot smoker. My doctor prescribed me adderall xr 20mg after I asked her to. I'm in college and I have a friend I go to school with who takes it. I found out about it from her and she gave me a few. When I took it I was fine. Even the come down wasn't as bad as what I am experiencing now. I took the first pill out of the bottle yesterday. The first 5 hours were great. I was focus on what I was doing and I had no anxiety or weird side affects what so ever. Around 2am I started feeling dizzy, fatigue, parts of my body was going numb, my limbs were getting weak and they hurt, i got massive migraines, chest pains, weird shots of pain that felt like lightning going up my spine to my neck, blurred vision, and my speech was slurred. I did not want to wake my parents up because I thought maybe i was just having a panic attack. My doctor put me on metadate prior to adderall and I had some panic disorders with it, but this was far worse. Then I realized that all of these horrible feelings couldn't be from anxiety. I usually just get the rapid heart beat, short breath, numbness due to hypertension, and chest pains. This was far worse! I felt like a thousand needles were poking into my chest, at time I felt so weak I thought I was going to faint, if I got up too fast I got dizzy spells and everything became a blur to me. I was so scared that I felt like I was going to die. I had read the papers given with the drug and it said to seek medical attention immediately with the symptoms that I had. I didn't want to do anything drastic like call 911, because thats what I did with the metadate and over time i felt fine, so instead I called the poison control hotline on the pamphlet. The woman over the phone said that what I was experiencing was normal and that everything only seems more intense because its late and i'm tired but I can't get any sleep. Her voice and assurance made me feel slightly better, but afterwards things just got worse. I don't understand why this drug had these effects on me when I took the same thing before with no problem! During that time I had anxiety as well, and I still did not have any issues. I love the fact that this drug helps me to remain focus, but the after affects are so horrible. Does anyone know if I can just sprinkle half of the pill in some food or something and I won't have these problems, or if there is something equivalent to adderall without those horrid side effect?